Files & Data
(10)Move between formats: CSV, JSON, XML, YAML: and clean up messy data.
Excel to CSV Converter
Convert XLSX or XLS sheets to CSV or TSV in your browser. Select sheets, delimiters, encoding and hidden data, with no file upload.
Excel Sheet Merger
Combine XLSX, XLS, XLSM, XLSB or ODS files locally. Keep source sheets separate or append rows with matching headers, then download an XLSX.
Excel Sheet Splitter
Split an XLSX or XLS workbook by worksheet tab, data-row chunks or a column value in your browser. Download one XLSX or a local ZIP, with no file upload.
CSV to Excel
Convert CSV data to a single-sheet XLSX workbook in your browser. Review delimiters, preserve identifiers, infer safe numbers, and keep file contents local.
XML to CSV Converter
Convert flat XML rows to comma-separated UTF-8 CSV in your browser. Supports attributes, validates strict limits, and protects spreadsheet formulas.
Archive Extractor
Inspect ZIP, JAR, XPI, DOCX, XLSX, PPTX and ODT containers locally in your browser, then download individual files without uploading the archive.
Word to Markdown Converter
Convert a Word DOCX file to clean Markdown in your browser. Keep headings, lists, links and simple tables, then copy or download the editable .md file.
Subtitle Converter
Convert SRT subtitles to WebVTT or VTT captions to SRT locally. Validate cue timings, preserve multiline text, then copy or download the result.
MKV to MP4 Converter
Convert MKV videos to MP4 for smoother playback on iPhone, iPad, QuickTime, browsers, TVs and editors. Upload a .mkv file and download a compatible .mp4.
M4A to MP3 Converter
Convert M4A audio to MP3 for wider playback support. Upload an .m4a file and download a compatible .mp3 copy.